Heating and drying apparatus



May 1 9, 19251A l 1,538,105

- w. B. FULTON l HEATING AND DRYING APPARATUS Filed May e. 1921 PatentedMay 19, 1925.

WILLIAM B. FUL'L of "F MIDDLETOWN, OHIO.

HEATNG .AND DRYING APPARATUS.

Application filed May 6, 1921.

To all lwlw/m z' may concern:

Be it known that I. VILLIAM B. FULToN, a citizen of the United States,and resident of Middletown, county of Butler. aud State of Ohio. haveinvented certain neuand useful Improvements in Heating and DryingApparatus, of which the `following is a tull. clear, concise, and exactdescription. reference being had to the accompanying drawings, forming apart oi this specification.

The present invention relates to drying apparatus to be used in theprocess of manufacturing paper or textiles. Such an apparatus usuallyconsists of a plurality of rolls or other driers heated by steamv and'the web oi material is caused to pass over the successive driers inContact with their heated surfaces. lt is desirable to arrange thedriers in groups and to maintain a dif` ference in steam or vaporpressure in the driers of' the diiterent groups. The first group oi'driers over which the web of inaterial passes is commonlyT called. thewet end of the machine and this group of driers is referred to herein asthe primary group. The other group of driers is commonly called the dryend of the machine and this group of driers is referred to as thesecondary group. have illustrated the invention as applied to a machineincluding only pri mary and secondary groups although it will beunderstood that the machine may be enlarged i'fdesired hy the additionof further groups of driers.

lt is an object of the present invent-ion to provide .a drying apparatusin which the driers may be heated efficiently by steam or other vaporand, in which a difference in.

pressure may' be maintained between the drier-s of successive groups. ltis also an ohject or" the invention to provide an apparatus of this kindwhich may be located partly in a basement or other limited space, .andit is a 'further object of the invention to provide means 'foreiiiciently relieving the apparatus of air and water of condensation.

In the drawings,-

Figure 1 is a side View of the apparatus, certain parts being shown insect-ion.

Figure 2 is a view partly in section and partly inelevation of one ofthe driers and associated parts. y

The Web of material is presumed to be passing over the drier from rightto left in Figure 1. The plurality of driers 7 disposed to the right ofthe valve 45, constitute the Serial No. 467,343.

primary group of driers or the wet end of the machine. The succeedingdriers 8 constitute the secondary group of driers. The supply pipe 10leads from a supply of steam under pressure and is connected by branches11 with cachot the driers 8 of the secondary `sgroup. Each vdrier isprovided With a pipe 1? opening from the lower part of the drier amiextending through the hollow1 trunnion 12 to a branch communicatingwiththe discharge pipe 15. lt will beunderstood that the hollow trunnion 12is so constructed as to permit the inlet of steam from the branch 11 andthe egress of steam, air .nd Water of condensation through the p'ipe' 3to the pipe permitting rotin,

15. While at the same -time tion of the drier 8. An illustrapive exampleof such a trunnion and connect on is shown'.

in my Patent No. 1,380,873 issuedIJuneL', 1921. l.

)In heating the driers 8 of the secondary group, the steam becomesreduced in pres' sure and with the air and. Water ocondensation passesout through the pipes'lv and 'their'.connected branches into themanifold.

15. A receiver 16 receives the discharge from the manifold 15 and in thedrawing the receiver isillustrated as located in space and extendingabove the manifold 15 and the lower part of the lower tier "of driers orthe secondary group. From a low point oi the manifold 15 a pipe 17 leadsinto a lower part of the receiver 16 While a vconnection 18 is made fromthe manifold-'15 to the upper part ofthe receiver. Water of condensationenters'the receiver through the pipe 17 and is ultimately dischargedaslwill be described. .Steam'and air enter the upper part of thereceiver through the connection 18. The steam and air are forced to passdown under a baille 20 in the receiver 'to the outlet 19, with which isconnected a pipe 21 communicating with a pipe 22. A4The pipe 22 isprovided with branches 23 conducting' the lowered pressure steam to thedriers 7 of the primary group, while each drier 7 is also provided witha discharge pipe 25 leading to the discharge manifold 27. The driers 7are provided with trunnions similar to those of the driers 8. lt isimportant to the cramped economical operation of the system that thedischarge of steamV from the primary driers be restricted and this maybe accomplished oy the provisieiiof steam traps 24 interposed inzrlthe:respective discharge branches 25. A lily-pass, iswprovided around eachof the steam traps. Each bypass has a valve 36 normally restricted butwhich may be fully opened at the commencement of operation to securecirculation of steam through the various elements of the system. The airand water of condensation discharged rom the primary driers into themanifold 27 passes through the pipe 28 and the check valve 29 into thetrap 30. The trap 30 isf provided with a float 3l and when the collectedwater reaches a pre-determined' level the float through valve mechanism32 operates to open valve 33 in a steam line 34 whereby steam isadmitted to carry the collected water to a boiler or other reservoirthrough the pipe 34.. To prevent the system from becoming ainbound anair vent 40 is connected with the pipe 28 between the trap-30 and theindividual steam traps with which the primary-driers are equipped.

In orderv tov discharge from the receiver 16 water' of condensationdrained from ther secondary driers I provide@ mechanism 41 arranged tooperate whenrlthewater 1n the receiverreaehes a pre-determined levelsofas to o enthe receiver to the'discharge pipe 43. hereupon, the steampressure in the receiver forces the Water out of the receiver throughthe discharge pipe 43. The'amount of water collected in the receiver maybe observed on the gauge 16".v

. The pipe 10 from whi h the driers of the secondary group are suppliedAwith high pressure steam communicates with the lpipe 22 from which thevdriers of the primary grou are supplied with lou pressure steam whichas been exhausted from the secondary driers. The communication betweenthe pipes 10 and 22,v however, is controlled by the valve 45 which maybe entirely closed to prevent .communication between the two pipes orwhich may be regulated so as to maintain the pressure in the driers ofthe primary group at-fany desired difference bef low that inthesecondary group; It is important that a. desired pressure differentialby maintained between the secondary and primary driers in order that theprimary driers may operate efficiently, while at the the piping d sametime the water of condensation may be discharged from the secondarydriers. It would be practically impossible so to design of the system asalways to maintain this esired differential and in the op eration ci thesystem various causes may alter the relations between the pressures inthe twogroups. By regulation of the valve 45, however, communicationbetween the high pressure pipe 10 and the VVpipe 22 may be accuratelycontrolled so as to restore and maintain the desired differentialbetween the pressures iii the secondary and,- rimary groups. A t thecommencement o operations thevalve 45 should be entirely closed Y -ondary- Leseno ondary driers into the receiver 16.

Water Will be collected in the receiver while the air will be blown outinto the pipe 22 and may be dischargedsby temporarily open ing the valve50.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent of the United States, is

1. A drier system, comprising va primary group of drers, a secondarygroup of driers, means for supplying steam under ressure to thesecondary group, means for discharging water of condensation from thesecondary group and for conducting steamand air from the secondary groupto the primar group, and a valve for maintaining a di ference in steampressure between the sec- KGroup and the primary group.

2. drier system, comprising a primary group of driers, a secondary groupof driers, means for supplying steam under pressure to lthe, secondarygroup, means or'dischar f ingr water of condensation from the secon' arygroup'and for conducting steam and airv from the secondary group to theprim group, and an adjustable regulator for a mittinglsteam from themeansvfor supplying the secondary group directly te the primary group.

3. A drier system, comprising Vva r'imary group of driers, a secondary'group o d'iers, means for supplyingstes/m under` pressure to thesecondary group', Means for discharg- 1 ing ',water' of condensationfromthe secondary group and for conducting steam and air from thesecondary group to the primary group, an adjustable regulator foradmitting steam fromythe means for supplyf ing the secondary groupdirectlyto the primary group, means for discharging ,air and water ofcondensation from the primary group, and means for restricting theescapev f nections to the primary group vto maintain a desireddifference in pressure therein, and means for discharging water ofcondensation from the secondary group and for conducting steam and airfrom thesecondary group.

to the primary group.

5. A drier system, comprising a primary group of driers, a secondarygroupof driers, 'a pipe connected with a supply' of steam` underpressure, connections from said-'pipe to the secondary group,connections from ipe said pipe to the primary group, an adjustableregulator in said pipe between the conso as to blow air and ivater fromlthe secefmectons to the secondary group andthe 'focmaaier nections tothe primary group, means for discharging water of condensation from thesecondary group and for conducting steam and air from the secondarygroup to the primary group, means for discharging air and water of'condensation from the primary group, and means for restrictingtlieescape of steam from the primary group.

6. A drier system, comprising a primary group of driers, a secondarygroup oi driers, means for supplying steam under pressure to thesecondary group. a pipe for discharging steam, air and water ofcondensation from the secondary group, a receiver extend ing above'saidpipe, a connection from said pipe tothe upper part of the receiver, aconnection from saidpipe to a lower art of said receiver, and a pipeextending rom the upper part of the receiver and communicating with theprimary group.

7. A. drier lsystem, comprising a primary group of driers, a secondarygroup of driers, means for supplying steam Aunder pressure to thesecondary group, a pipe for discharging steam, air and water oicondensation from the secondary group, a receiver extending above saidpipe, a connection from said pipe to the upper part of the receiver, aconnection from said pipe to a lower part of said receiver,a pipeextending from the upper part of the receiver and communicatingwithrtlie primary group, means for discharging air and water ofcondensation from the primary group, and means for restricting theescape of steam from the primary group.

8. A drier system, comprising a primary group of driers, a secondarygroup of driers, means for supplying steam under pressure to thesecondary group, a pipe for discharging steam, air and water ofcondensation from the secondary group, a receiver extending above saidpipe, a connection from said pipe to the upper part of the receiver', aconnection from said pipe to a lower part of said receiver, a pipeextending from the upper part of the receiver and communicab intr withthe primary group', and an adjust able regulator for admitting steamfrom means for supplying the secondary directly to the primary group.

t). A drier system, comprising g group of driers, a secondary groinV` i.f means for supplying steam linde to the secondary group, a pipedischarging steam, air and water ci lensation `from the secondary group,vveiver extending above said pipe, a iection from said pipe to the upperpar1 the receiver, a' connection from said pipe to a lower part of saidreceiver, a pipe extendingr from the upper part of the receiver andcommunieating with the primary group, means for discharging air andwater of condensation Ifrom the primary group, means for restrict- Aingthe escape of steam from the primary group, and an adjustable regulatorfor ad mitting steam from the means for suppiying the secondary groupdirectiy to tire pri-1 mary group.

10. drier system. conuorisinpr a primary group of driers, a secondarygroup of, driers, aspipe connected wit'u asupplv ci steam underpressure, connections from pipe to' t'ne secondary group, connectionsfrom said pipe` in) the primary group, an adnstable regulator in saidpipe between the connec tions to tbesecondary group and' the connections to the primary group, te pipe for dieM charging steam, air andwater of condensation from the secondary grouppa receiver extendingabove said pipe, a connectirm from said pipe to the upper part oftbe-receiver, a connection from saidA pipe to a lower part oftirereceirer, a pipe eX- tending from the upper part of tbereceiver".and communicating with .primary C group.

1]. A drier system, comprising a primary group of driers, asecondarygronp ej? riers, a pipe connected with a supply orunder'pressure, connect/'ons from said to the secondary group,connections from said pipe to the primary group, anY adju@- ableregulator in said pipe between the connections to. the secondary groupand the team connections to the primary, group, a pipeA for dischargingsteam, air-and water oi condensation from the'secondary group, areceiver extending above/'said pipe, a connection from said pipe to theupper part of the receiver, a connection from said` pipe to a lower partof the receiver, a pipe extending from the upper part of the receiverand communicating with the primary group,

a trap for discharging water of condensation from the primary group,means for re stricting the lescape of steam from the primar ou and anair vent between said trap and said restricting means.

12. A drier system, comprising a primary group of driers, a secondarygroup of driers, .uns for supplying steam under pressure io thesecondary group, means for discharging water of condensation from thesecondf ary group and for conducting steam and air from the secondarygroup to the primary group, and a valve so located that steam issupplied to all of the secondary driers before it reaches said valve andthat it controls the pressure of the steam passing to all of the driersof the primary group, thus being adapted to maintain a di'erence inpressure between the secondary group and the primary group.

. 13.' A drier system, comprising a primary group of driers, a secondarygroup of driers, means for supplying steam under pressure to thesecondary group, means for j :r masias sewndary group and flr conductingsteam pressure between the scondary group lmdi) and air from thesecoirlary group to the 'the' primary gruup a primary grolp, a receiverconncij/id to said In wness whereof, I hereunto subscribe nufzxns, mndYa valve 'so located tiit 'Steam is my name this 30th day f April',1.921. supplied tofall of rthe secondary drershefore t'reaches saidvalve and'that it con- WM. BJ'FULTON. trois the pressure of the steampassing to Witnesses: all si fnhe drers of the primary group, thus f H;SERALE,

'being adapte to maintain a difference in H. KEMHL

